[RE-wrenches] rebar v/s fiber

[William Miller]

Ray:

We've been using this interpretation for years.

William Miller


At 01:26 PM 3/13/2010, you wrote:
>Actually my read of 2008 code should allow the pole to qualify as the 
>grounding electrode:
>690.47 (D) allows the mounting structure to be the electrode if it 
>meets  250.52.
>250.52(A.7) plate electrode says you need at least 2 sq. ft of 1/4" steel 
>plate.
>A 6" diam pipe 4 ft in the ground, will have 6.8 sq. ft of surface area......
>A 4" diam pole will have 4.7 sq ft of surface area.....
>Anybody see a flaw in this logic?
>
>R. Walters
>ray at solarray.com
>Solar Engineer
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